#include <bits/stdc++.h>
using namespace std;

int main()
{
    int W;
    int N;
    cin >> W >> N;
    vector<int> A(N);
    for (int i = 0; i < N; i++)
    {
        cin >> A[i];
    }
    sort(A.begin(), A.end());
    int now = 0;
    for (int i = 0; i < N; i++)
    {
        if (now + A[i] > W)
        {
            cout << i;
            return 0;
        }
        now += A[i];
    }
}